In January, Google's social network reportedly leapt past Twitter and Youtube in monthly active users, though the inexact nature of those statistics also raised some doubts.

Now Facebook is preparing to unveil a News Feed redesign that could feature larger photos, new image-based ads, revamped feeds for photos and music, and new ways to navigate and search, at least according to TechCrunch sources.

Wednesday's Google+ update is rolling out "gradually" and should be available to all users soon. We'll see how the changes stack up with what Facebook has in store tomorrow. It could make for an interesting battle of the social sites.